Barge



e. c. ENGSTR'AND.

BARGE. I APPLICATION FILED APR.27, I921. 1,403,899. Patented Jan. 17,1922.

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GUNNAR C. ENGSTRAND, OF. BROOKLYN, NEW YORK.

BARGE.

Application filed April 27, 1921.

To all whom it may concern:

Be it known that I, GUNNAR C. ENG- STRAND, a subject of the King of Sweden, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Barges, of which the following is a specification.

My invention provides a composite plank supporting framing for structures of quadrilateral section like barges and pontoons.

My invention provides double flanged deck and bottom stringers resting on shouldered uprights to support the deck and bottom planking.

My invention provides diagonal one-piece tension members which receive their initial tension from the flanged deck and bot tom stringers, which are kept in a sprung position over the shouldered uprights.

My invention also provides end uprights having the planes of the shoulders at their opposite ends converging, so that the initial tension in the diagonal members will be further increased when the end uprights are pressed home between the flanges of the sprung deck and bottom stringers.

My invention also provides a crowned bottom and deck.

In the drawing Figure 1 shows a cross section of a barge.

Figure 2 shows a fractional longitudinal section on the line AA on an enlarged scale.

Referring to the drawing in which like reference characters designate corresponding parts, 1 represents the transverse barge frame.

The barge frame 1 comprises double flanged bottom and deck stringers 2 which stringers rest upon shoulders 3 cut at the ends of the center uprights 4.

The stringers 2 are kept in a sprung position over the shoulders 3 by means of the diagonal eye bars 5 which are secured to the double stringers by means of pins o.

The end uprights 7 are furnished with shoulders 8 so inclined that the plane of the top shoulders converges toward the plane of the bottom shoulders. The end uprights 7 will then wedge between the sprung deck and bottom stringers 2 when being pressed outwards, and the initial tension in the diagonal eye bars 5 will be increased.

The uprights are kept in their proper positions b means of bolts 9.

Specification of Letters Patent.

Patented Jan. 17, 1922.

Serial No. 464,860.

At the ends the web of the flanged stringers 2 has been bent over to form a corner flange 10, to which flange the corner planks are conveniently bolted.

Planking 11 is bolted to the barge frames 1 in the conventional manner.

The procedure of construction is as follows The double bottom and deck stringers 2 are first clamped to the ends'of center uprights 4 and pressed well home against the shoulders 3.

The ends of the stringers are now sprung together and the diagonal eye bars 5 are secured to the stringers 2 by means of pins 6.

The end uprights are inserted and pressed well home and the bolts 9 are inserted.

The frames 1, when completed, are properly spaced and the planking 11 is bolted to them in the conventional manner, and the barge is completed.

I do not wish to be understood to limit myself to the construction of barges, as other floating structures like dry dock pontoons, etc., can be readily bullt after the same method.

I claim 1. In a floating structure, planking, frames supporting the planking, said frames comprising double flanged deck and bottom stringers, intermediate shouldered uprights which are secured at both ends between the double flanged deck and bottom stringers which rest on the shoulders of said intermediate uprights and diagonal tension members holding the double stringers in a sprung position over the shoulders of the intermediate uprights.

2. In a floating structure, planking, frames supporting the planking, said frames comprising double flanged deck and bottom comprising double flanged deck and bottom against the shoulders of the intermediate stiinlgl'ers, interrneidiatf,J slfioulgergd uprighfis uprights.

w 10 are secure at 0t en s etween t e double flanged deck and bottom stringers GUNNAR ENGSTRAND which rest on the shoulders of said interme- \Vitnesses:

diate uprights and diagonal tension mem- Y FREDERICK W. QUmAs,

bers holding the double stringers pressed FRANK NICHOLS. 

